Frictional-unit control for multidial radio sets



.March 1,1927.

. w. T. HERRICK" FRICTIQNAL UNIT CONTROL FOR MULTIDIAL RADIO SETS Filed July 9, 1926 anoenfo'a WZHerI w/Z' Witneooeo Patented Mar. 1, 1927'.

linemen, of mm, OKLAHOMA, f

Application men J'uly fl,

'Ihi's inventiodrelates'to a frictional unit control fora plurality ofrlials, and is especially adapted to'be'used in connection with aradio rceiving'set;

The object'ofthe invention is tosilnplify and facilitate' th e finding and tuning in of 'diiferent stationson a ll'lllltlftllzil receiving set" by s'ynchroniz'ingthe movements ot the various dials; mid -controlling the-same from r 0 a sihgleaottmtingmember; This result is acoomplished'by making direct frictional contactwitli the several di'als, thereby elimi- -'f1atjing"all Springs, cordsfpulleys; spur or bevel gearing, 'orot'he'r mechanical contrivtimes, whichfresu lt in a certain-degree of tailed description;which to be considered 1 '.'lostniot-ion"whenever power is transmitted.

The specific construction of the invention. "and't'he advantages resulting therefrom will be more fullyeXpla-ined 111 the'tollowing de- 7 gin connectionfiwith the accompanying drawing illustfatlng h 's i ne in its preferred iv PM I: I v

the drawlngz i Y Figure l is'a front elevation of the=panel of a radio receiving set having the inventioii."1no1'1ntecl thereon"; y

' r FIgur Q'is a bottom plan View of the sainc.

" iF i g uieails "asection taken on the line fFig urelns a section taken' onv the line of Figure B." j

j The inv'e'ntion is illustrated inconnection 'With the" pan'el 5 of a radio receiving set,

h'aying aplurality of dials 6; 'In applying :j' 4ofbracket 7 swarm/r0, the 10Wer of the invention'therctoia plurality of bracke-ets 7fa r mounted on the panel 5 by means 1 offbasefla ng'e's 8, Whic'h'are secured thereto "byj'screw's or' bolt 9; Associated 'With'each which isp'ix o't'a'lly connected to the bracket by afpi n or' stud bolt 11; A shaft 12 is To tatably"mounted in the upper ends of the warms: "10', and pa sses'through slots 13in the fbrackets'"7.; "The slots 13 are arcuate and 'concentri'e' with ithefpins orbolts '11, so as 'iio'r inwardly on the arms 10.

' to permit the shaft to beswung'outwardly Oppositeeachdiali6, a wheell l of-rubber,

1926. Serial No. 121,388.

dials; so that when the wheels arerotated 17 secured to one end thercohnnd in order to prevent longitudinal movement of the a shaft 12 one end thereof b'ea'r-sagainst the left-hand bracket '7; while a-hub- 18 is tsecured to the shaft by means ofa screw 19, adjacent one of'thearmsi10; The friction wheels M- are heldyieldingly in engagement with the respcctire dials by spring arms 20, the lover ends of whiclrare-secured by the bolts which secure the lower ends "of the COIIGS 'JOIKllTlg" brackets. The upper-end of each arm 20 bears against a stud 21 projecting 'lronr theupper port-ion of the'adjaeent'arml0.-

fr shaft 22'is'rota-tably mounted" in the brackets *7 below the shaftlZ and parallel thereto. 22 isformed with a-QanrslQt 23 through 4, is iii-normal position, therespcctive arms ll) pass'close to the bottoms of the-slots 23,

Opposite each :um'10,--this' shaft and the wheels l l: are held in frictional con- I tact with the dials 6. l'Vhenthe shaft ZQ is rocked, 'however,theedges of the-slots 23 engage the edges of the corresponding arms 10; and 'lllOVG the latter outwardlysufiicicntly to disengage-the wheels-llfroin the-dials. The shaft22 is rocked by means of a finger piece 2% formed at one end thereof, and longitudinal movement of the-shaft 22is 'irevented byP-collars 25; which are secured thereto by means of set-screws 26 adjacent the faces ofthe outer brackets 7 From the foregoing description, it will he understood that the friction Wheels 14 are normally held in contact with the dials 6, and if the wheels have been properly" adjusted longitudinally of the shaft 1-2, a

rotation of the latter "will. cause all ofthe dials to be rotated synclnronously,and there will be practically no lOSt'IDOlZlOIla In case the relative 'positionsof-the dialsG-become slightly disarrangjed,'they inay ='be individually adjusted after rocking -the--shai't 22 'sufiiciently' to 'release"th'e= wheels- 14 thereao- 2hr sivn'i'ilarltnateria'l, isniountedon the shaft fronr. The unit control*ehables'the :oper- =12 by rneansof' a hlib lfi, which is'adjust' *2 ably: secured to the shiafteby means of a set screw 16; Thus, the Wheels 14 are indif v'idually adjustable lengthwise of the shaft 5 2, to 9,.thet1 hey. 1 ;b ar at '1 propef distances froni' the centers of the ator to pass quickly from .one*sta tion-to-an-' other without any of the clifhcillties which arise-in endeavor-mg toadpist each dialindividna'lly.

While "I hate 'tles'c1ibetl' i'ancl illustrated the invention as applied to a rad-io receiving set, it is obvious that it may be used in connection with any series of rotatable elements which it is desired to control simultaneously. The specific details of construction may be also considerably modified without any material departure from the salient features of the invention as set forth in the claims.

What is claimed is:

1. The combination with a panel and a plurality of dials rotatably mounted thereon, of a plurality of brackets :secured to the panel and extending forwardly therefrom, arms pivotally connected to the brackets to swing toward and away from the panel, a shaft journaled in said arms, frictional wheels secured on said shaft, swinging means acting on said arms to cause said friction wheels normally to bear against the respective dials, means for rotating said Shaft to cause said dials to rotate in unison when engaged by said wheels, a second shaft mounted for rocking movement in said brackets and having cam slots adjacent the rear edges of said arms, and means for rocking said second shaft to cause the edges of said slots to engage the arms and move the latter forwardly in opposition to said spring means, thereby disengaging the friction wheels from the dials.

2. The combination with a plurality of rotatable dials arranged side by side, of a unit control device therefor, comprising a shaft disposed transversely in front of the dials, friction wheels secured on the shaft, parallel arms in which the shaft is journaled, spring means acting on said arms to cause said friction wheels normally to bear against the respective dials, a second shaft mounted for rocking movement and having cam slots adjacent the rear edges of said arms, and means for rocking said second shaft to cause the edges of said slots to engage the arms and move the latter forwardly in opposition to said spring means, thereby disengaging the friction'wheels from the dials.

3. The combination with a plurality of rotatable dials arranged side by side, of a unit control device therefor, comprising a shaftdisposed transversely in front of the dials, arms in which the shaft is journaled, said arms being disposed in parallel vertical planes, a plurality of friction wheels, each having a hub secured to the shaft and inclividually adjustable lengthwise of said shaft,

spring means acting on said arms to cause said friction wheels normally to bear against the respective dials, a. second shaft mounted for rocking movement and having cam slots adjacent the rear edges of said arms, and means for rocking said second shaft to cause the edges of said slots to engage the arms and move the latter forwardly in opposition to said spring means, thereby disengaging the friction wheels from the dials.

f. The combination with a panel and a plurality of dials rotatably mounted thereon, of a plurality of brackets secured to the panel and extending forwardly therefrom, arms pivotally connected to the brackets to swing toward and away from the panel, a shaft journaled in said-arms, friction wheels secured on said shaft, yieldable means acting on the arms to cause said friction wheels normally to engage the respective dials, and means for swinging all of said arms forwardly in unison to disengage the friction wheels from the dials.

5. The combination with a panel and a plurality of dials rotatably mounted thereon, of a plurality of brackets secured to the panel and extending forwardly therefrom, arms pivotally connected to the brackets to swing toward or away from the panel, a shaft journaled in said arms, friction wheels secured on the shaft, spring means acting on said arms to cause the friction wheels normally to bear against the respective dials, a second shaft mounted for rocking n'i-ovement and disposed in parallel relation to the first shaft, said second shaft havin cam slots adjacent the rear edges of said arms, and means for rocking said second shaft tocause the edges of said slots to engage the arms and move the latter forwardly in opposition to said spring means, thereby disengaging the friction wheels from the dials.

(3. The combination with a panel a'nd a plurality of dials rotatably mounted thereon, of a plu 'ality of l 'ackets secured to the panel and extending forwardly therefrom, arms pivotally connected to the brackets to swing in planes perpendicular to the panel, a shaft journaled in said arms, said brackets having arcuate slots in which said shaft moves the arms are swung ontheir pivots, a plurality of friction wheels, each having a hub secured to the shaftand individually adjustable lengthwise of said shaft, a pin extending laterally from each arm, a spring secured to the panel adjacent each arm and bearing against said pin to urge the respective arms toward the panel to cause the friction wheels to engage the respective dials, a second shaft mounted for rocking movement and having cam slots adjacent the rear edges of said arms, and means for rocking said second shaft to cause the edges of said slots to engage the arms and move the latter forwardly in opposition to said springs, thereby disengaging the friction wheels from the dials.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature.

VILLIAM i T. HERRTCK. 

